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CBSE Class 12-science Answered

  a,b and c are vectors.     Options for the question is equal perpendicular 0 vector, 0 vector parallel 
Asked by Priyanka Margaret | 25 Apr, 2014, 01:39: PM
answered-by-expert Expert Answer
a cross times open parentheses b cross times c close parentheses equals b cross times open parentheses a cross times c close parentheses  a cross times open parentheses b cross times c close parentheses equals b open parentheses a. c close parentheses minus c open parentheses a. b close parentheses space a n d space b cross times open parentheses a cross times c close parentheses equals a open parentheses b. c close parentheses minus c open parentheses b. a close parentheses  rightwards double arrow b open parentheses a. c close parentheses minus c open parentheses a. b close parentheses equals a open parentheses b. c close parentheses minus c open parentheses b. a close parentheses  rightwards double arrow b open parentheses a. c close parentheses equals a open parentheses b. c close parentheses space space space space space space space space open square brackets c open parentheses a. b close parentheses equals c open parentheses b. a close parentheses close square brackets  rightwards double arrow space a space parallel to b
 
Hence option 'B' is correct.
Answered by | 25 Apr, 2014, 03:08: PM
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